Las Vegas mass shooting: the aftermath | photos

Las Vegas mass shooting: the aftermath

Flowers are placed near the scene of a mass shooting in Las Vegas Strip in Las Vegas on Sunday. Photo: AP Photo/Marcio Jose Sanchez

Mandalay Bay resort and casino is seen in the aftermath of a mass shooting on the Las Vegas strip. Photo: AP Photo/Marcio Jose Sanchez

Police officers guard a roadblock in front of the Luxor and Mandalay Bay resort and casino in the aftermath of a mass shooting on the Las Vegas Strip, Monday, Oct. 2, 2017, in Las Vegas. Photo: AP Photo/Marcio Jose Sanchez

Investigators load a truck next to a body from the scene of a mass shooting at a music festival near the Mandalay Bay resort and casino on the Las Vegas Strip. Photo: AP Photo/Chris Carlson

Perched in his suite at a high-rise hotel overlooking the Vegas Strip, a 64-year-old retiree with no real criminal history and no known affiliations with terror groups rained bullets down into a crowd at a country music festival Sunday, killing at least 59 people and injuring hundreds more in the deadliest mass shooting in modern American history.

The attack, at least initially, was as inexplicable as it was horrifying.

Law enforcement officials said they could not immediately tell what drove Stephen Paddock to fire at thousands of unsuspecting concertgoers from the 32nd floor of the Mandalay Bay Resort and Casino before killing himself.